High-Temperature Synthesis of High-Entropy Alloy PtPd_CoNiCu Nanoparticles as a Catalyst for the Oxygen Reduction Reaction | Sciact - CRIS-system of Boreskov Institute of Catalysis

High-Temperature Synthesis of High-Entropy Alloy PtPd_CoNiCu Nanoparticles as a Catalyst for the Oxygen Reduction Reaction Full article

Journal

International Journal of Molecular Sciences
ISSN: 1422-0067 , E-ISSN: 1661-6596

Output data

Year: 2025, Volume: 26, Number: 23, Article number : 11504, Pages count : 17 DOI: 10.3390/ijms262311504

Tags

platinum-based electrocatalysts; high-entropy alloys; multicomponent systems; high-temperature synthesis; heat treatment; oxygen reduction reaction; durability

Authors

Nevelskaya Alina ^1,2 , Gavrilova Anna ¹ , Lyanguzov Nikolay ³ , Tolstunov Mikhail ² , Pankov Ilya ⁴ , Kremneva Anna ⁵ , Gerasimov Evgeny ⁵ , Kokhanov Andrey ¹ , Belenov Sergey ¹

Affiliations

1	Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia
2	Federal Research Center the Southern Scientific Center of the Russian Academy of Sciences (SSC RAS), 41 Chekhov Ave., Rostov-on-Don 344006, Russia
3	Department of Physics, Southern Federal University, 5 Zorge St., Rostov-on-Don 344090, Russia
4	Research Institute of Physical Organic Chemistry, Southern Federal University, 194/2 Stachki St., Rostov-on-Don 344090, Russia
5	Boreskov Institute of Catalysis, Ac. Lavrentieva Ave. 5, Novosibirsk 630090, Russia

Funding (1)

Russian Science Foundation

25-79-20045 (125070307890-6)

The aim of this work was high-temperature synthesis of PtPdCoNiCu/C nanoparticles with high-entropy alloy (HEA) structure as catalysts for oxygen reduction reaction. The materials were synthesized using a highly dispersed PtPd/C support, which was impregnated with Cu, Ni, and Co precursors followed by their precipitation with an alkali. Subsequently, the material was subjected to thermal treatment in a tube furnace at 600 °C for 1 h in a stream of argon containing 5% hydrogen. In combination with HRTEM, element mapping and line scan, XRD, and XPS data, these results confirm the successful synthesis of five-component PtPdCoNiCu high-entropy alloy nanoparticles on the surface of the carbon support. The obtained materials are characterized by a high electrochemical surface area of up to 63 m2/g(PGM), as determined by hydrogen adsorption/desorption and CO-stripping, and a high specific oxygen reduction reaction (ORR) activity of approximately 269 A/g(PGM) at 0.9 V vs. RHE. The synthesized material demonstrated outstanding stability, as confirmed by an accelerated stress test of 10,000 cycles. After the test, the electrochemical surface area decreased by only 12%, while the catalytic activity for ORR even increased. The proposed synthetic strategy opens a new pathway for obtaining promising highly stable five-component HEA nanoparticles of various compositions for application in catalysts.

Nevelskaya A. , Gavrilova A. , Lyanguzov N. , Tolstunov M. , Pankov I. , Kremneva A. , Gerasimov E. , Kokhanov A. , Belenov S.
High-Temperature Synthesis of High-Entropy Alloy PtPd_CoNiCu Nanoparticles as a Catalyst for the Oxygen Reduction Reaction
International Journal of Molecular Sciences. 2025. V.26. N23. 11504 :1-17. DOI: 10.3390/ijms262311504

Submitted:	Nov 4, 2025
Accepted:	Nov 26, 2025
Published online:	Nov 27, 2025
Published print:	Dec 1, 2025

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